filter.php

<?php
namespace Bitrix\Landing\Source;
 
abstract class Filter
{
    protected $fields = [];
 
    protected $fieldTypeHandlers = [];
 
    public function __construct()
    {
        $this->initFieldTypeHandlers();
    }
 
    public function setFields(array $fields)
    {
        $this->fields = $fields;
    }
 
    public function create(array $sourceFilter)
    {
        $result = [];
        if (empty($this->fields) || empty($sourceFilter))
        {
            return $result;
        }
 
        $quickSearchField = $this->getQuickSearchField();
 
        foreach ($sourceFilter as $row)
        {
            if (!BlockFilter::checkPreparedRow($row))
            {
                continue;
            }
 
            $index = $row['key'];
            $value = $row['value'];
 
            if (!isset($this->fields[$index]))
            {
                continue;
            }
 
            if (
                $index === $quickSearchField
                && isset($value['QUICK_SEARCH'])
                && $value['QUICK_SEARCH'] == 'Y'
            )
            {
                $this->addQuickSearchValue($result, $index, $this->fields[$index], $value);
            }
            else
            {
                $handler = $this->getFieldHandler($this->fields[$index]);
                if ($handler !== '' && is_callable([$this, $handler]))
                {
                    call_user_func_array(
                        [$this, $handler],
                        [&$result, $index, $this->fields[$index], $value]
                    );
                }
            }
        }
        unset($row);
 
        return $result;
    }
 
    protected function initFieldTypeHandlers()
    {
        $this->fieldTypeHandlers = [];
    }
 
    protected function getFieldHandler(array $field)
    {
        $result = '';
        if (!isset($field['type']))
        {
            $field['type'] = 'string';
        }
        if (isset($this->fieldTypeHandlers[$field['type']]))
        {
            $result = $this->fieldTypeHandlers[$field['type']];
        }
 
        return $result;
    }
 
    protected function getQuickSearchField()
    {
        $result = null;
        if (!empty($this->fields))
        {
            foreach (array_keys($this->fields) as $index)
            {
                $row = $this->fields[$index];
                if (
                    (!isset($row['quickSearch']) && !isset($row['quickSearchOnly']))
                    || (isset($row['entity']) && $row['entity'] != 'master')
                )
                {
                    continue;
                }
                $result = $row['id'];
            }
            unset($row, $index);
        }
        return $result;
    }
 
    protected function addQuickSearchValue(array &$result, $fieldId, array $field, array $value) {}
}